Core-oil.



S GEE LOWE,'0F LOS ANGELES, CALIFORNIA, ASSIGNOR O F ONE-HALF T JOHN W. FELTES, DE LOS GELES, CALIEOR.

cons-01L.

No Drawing.

To all gokom it may concern: Be 11; known that I, S Gen Lown, a citizen of theUnited States, residing at Los Angeles, in the county ofLos Angeles and State of California, have invented new and useful Improvements in Gore-Oil, .of which the following is a specification.

This invention relates to a core oil used in' forming cores for making castings.

Cores are bodies of sand .placed in molds to serve as a part thereof. As they must be molded in a core box, removed therefrom, baked and transferred to the mold, it is necessary to provide a binder forthe sand, Which will hold the latter together making its, removal and transfer possible without its form being destroyed. 1 The binder should be of such a character that it will not cause the sand to stick to the core box, and will not burn while being baked. In addition to this it should not will not generate detrimental gasesin' use in i the mold, and which will be inexpensive.

These objects are accomplished by the core oil whose composition is disclosed hereinafter.

In carrying out this invention a mixture of linseed oil, rosin,.distillate and kerosene is formed. A batch of the oil is made in the following proportions, and in the following manner. 7

T0124 gallons of'linseed oil is added 140 pounds of rosin; The rosin may be of any grade. seed oil is brought to the boiling point, and the-rosin is addedgradually, the boiling being continued until all of the rosin is melted. The compositionthus obtained, 1f allowed to cool would be viscous. To this composition is added 15 gallons of distillate. The distillate referred to is that which is derived from the distillation of petroleum and is distilled ofi at a lower temperature than .of, distillate.

Before adding the rosin, the lin- Specification of Letters Patent. t nt d am, 2a, was, Application m'a April 4, 1918. Serial no. 226,785.

kerosene, intermediate benzin and kerosene. This product'is marketed under the name The distillate is used to cut the rosin and.cause it to dissolve. composition thus obtained is added 6% gal- To the lons of kerosene. The kerosene so changes the composition that it prevents the sand from sticking to the core box. Kerosene alone, however, will not cut the rosin, and dlstillate alone will not prevent the sand sticking to core boxes. For this reason both.

distillate and kerosene are necessary to producethe finished product with all of the desired characteristics. 0

The rosin used is equivalent in volume to about 17% gallons. The proportions (if ingredients are, therefore: linseed oil 24.05 er centum, rosin 33.65 per centum, distil ate 29.80 per centum, and kerosene 12.50 per centum by volume.

However, the proportion of .linseed oil may be varied. The less the roportion of linseed oil used the greater wil l bethe tendency to burn in. baking. The greater the proportion of linseed 'oil the greater will be the expense.

Instead of linseed oil, other viscous oils may be used, for illustration, paraffin oil. The linseed oil serves the purpose of a slow drier preventing the composition from burning due to fast drying. Any slow drying oil which will dissolve the rosin with the other ingredients mentioned will serve the purpose. I have, therefore, used the term slow drierinthe claims to designate this oil.

The proportion of rosin, distillate and kerosene to each other is: rosin 44.30 per centum, distillate 39.24 per centum, and kerosene 16.46 per centum by volume. The proportion of slow drier may be varied depending upon the particular oil used.

What I claim is:

1. A core oil comprising rosin dissolved in a slow drier, distillate and kerosene, said rosin, distillate, and kerosene being in the proportions of substantially 44.30 per centum of rosin, 39.24 per centum of distillate and 16.46 per centum of kerosene by volume.

2. A core oil comprising rosin dissolved in linseed oil, distillate, and kerosene being in the proportions of substantially 44.30 per centum of'rosin 39.24 per centum of distillate and 16.46 per centum of kerosene by volume.

5 ingredients bein substantially in the proportion of linsee oil 24.05 per centum, rosin 33.65 per centum,

distillate 29.80 per cen tum, and kerosene 12.50 per centum by volume.

In witness that I have hereunto subscribed my name this 25th day of March, 1918.

s GEE LOWE.

claim the foregoing I 10 I 

